Troubleshooting delegate controls can be hard as there is no easy way of knowing what controls make it to the page... well until now! Kudos to Waldek Mastykarz for creating the Get-DelegateControls powershell script that gets the job done. Samples: .\Get-DelegateControls.ps1 http://publishing | ft Id, ControlClass, ControlSrc .\Get-DelegateControls.ps1 http://publishing "AdditionalPageHead" -AllowMultiple | ft ControlClass, ControlSrc